Re: Core temperature
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Dag-Erling Sm=C3=B8rgrav wrote:
> I've written a quick-and-dirty driver for the built-in digital
> temperature sensor in Intel's Core and Core 2 CPUs (and Xeons built on
> the Core architecture). The driver exports four sysctl nodes under
> hw.coretemp:
>=20
> hw.coretemp.tjmax Maximum core temperature (currently hardcoded
> To 100=C2=B0C, may actually be 85=C2=B0C on som=
e systems)
>=20
> hw.coretemp.delta current temperature in =C2=B0C below Tj(max)
>=20
> hw.coretemp.interrupt Lower 32 bits of the IA32_THERMAL_INTERRUPT MSR=
>=20
> hw.coretemp.status Lower 32 bits of the IA32_THERMAL_STATUS MSR
>=20
> I intend to move these into dev.cpu.N in a later version.
>=20
> Note that the driver currently makes no attempt to handle multi-CPU
> systems; it will simply report the temperature of the CPU that contains=
> whichever core the requesting process happens to be running on.
>=20
> http://people.freebsd.org/~des/software/coretemp-20070810.diff
>=20
Hi Des,
thanks a lot!
Could you please try to explain these results?
> sysctl hw.coretemp.tjmax hw.coretemp.delta hw.acpi.thermal.tz0.temperat=
ure
hw.coretemp.tjmax: 100
hw.coretemp.delta: -38
hw.acpi.thermal.tz0.temperature: 66.8C
Shouldn't hw.coretemp.delta be (hw.coretemp.tjmax -
hw.acpi.thermal.tz0.temperature)?
Thanks!
> DES
--=20
Pietro Cerutti
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